Initial state

Microsoft.AspNet.NodeServices.React/Content/Node/react-rendering.js

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+var fs = require('fs');
+var path = require('path');
+var React = require('react');
+var ReactDOMServer = require('react-dom/server');
+var createMemoryHistory = require('history/lib/createMemoryHistory');
+var babelCore = require('babel-core');
+var babelConfig = {};
+
+var origJsLoader = require.extensions['.js']; 
+require.extensions['.js'] = loadViaBabel;
+require.extensions['.jsx'] = loadViaBabel;
+
+function loadViaBabel(module, filename) {
+    // Assume that all the app's own code is ES2015+ (optionally with JSX), but that none of the node_modules are.
+    // The distinction is important because ES2015+ forces strict mode, and it may break ES3/5 if you try to run it in strict
+    // mode when the developer didn't expect that (e.g., current versions of underscore.js can't be loaded in strict mode). 
+    var useBabel = filename.indexOf('node_modules') < 0;
+    if (useBabel) {
+        var transformedFile = babelCore.transformFileSync(filename, babelConfig);
+        return module._compile(transformedFile.code, filename);        
+    } else {
+        return origJsLoader.apply(this, arguments);
+    }
+}
+
+module.exports = {
+    renderToString: function(callback, options) {
+        var resolvedPath = path.resolve(process.cwd(), options.moduleName);
+        var requestedModule = require(resolvedPath);
+        var component = requestedModule[options.exportName]; 
+        if (!component) {
+            throw new Error('The module "' + resolvedPath + '" has no export named "' + options.exportName + '"');
+        }
+        
+        var history = createMemoryHistory(options.baseUrl);
+        var reactElement = React.createElement(component, { history: history });
+        var html = ReactDOMServer.renderToString(reactElement);
+        callback(null, html);
+    }
+};